gula vs oropharynx

gula

noun
  • The upper front of the neck, next to the chin; the upper throat. 

  • A capping moulding; a cymatium. 

  • A plate which in most insects supports the submentum. 

oropharynx

noun
  • The oral part of the pharynx, reaching from the uvula to the level of the hyoid bone. 

How often have the words gula and oropharynx occurred in a corpus of books? (source: Google Ngram Viewer )